HAV Review – IOSH South Wales Jim Maccall Notes for delegates attending HAV Management Essentials Programme

Session Plan HAVS Basics Health Focus Controls / Assessment PPE Common Pitfalls Health Surveillance Notes for delegates attending HAV Management Essentials Programme

“I know it like the back of my hand” Complicated bits of kit! What is HAVS? “I know it like the back of my hand” Complicated bits of kit! Notes for delegates attending HAV Management Essentials Programme

What is HAVS? HAVS – Hand Arm Vibration Syndrome includes more than one condition including: Vibration White Finger Carpal Tunnel Syndrome Notes for delegates attending HAV Management Essentials Programme

Vibration White Finger (VWF) Symptoms – Permanent loss of feeling in their fingers Blanching of finger Long-term damage can lead to Gangrene Notes for delegates attending HAV Management Essentials Programme

Notes for delegates attending HAV Management Essentials Programme

Carpal Tunnel Syndrome Notes for delegates attending HAV Management Essentials Programme

Scale of issue? 1997 to 1998 Survey – 288,000 sufferers Approx. 500 new cases diagnosed per annum 11% of cases are women High risk activities were extraction i.e. mining Current high risk industries? Notes for delegates attending HAV Management Essentials Programme

HSE Health Focus UK Fatality rate – 2017 25 work at height deaths 31 struck by moving vehicle Notes for delegates attending HAV Management Essentials Programme

HSE Health Focus UK Fatality rate – 2017 – fatalities per 100,000 workers Notes for delegates attending HAV Management Essentials Programme

HSE Health Focus Construction 10,000 - premature deaths linked to construction dust 1,000 – mental well-being – Suicide 2,300 per 100,000 workers with Musculoskeletal Disorders 75% of civil claims are for noise induced hearing loss Notes for delegates attending HAV Management Essentials Programme

Managing the Risk Risk Assessing is simply done: Look at the whole job How many workers What kit is being used Get reliable vibration data Add K = Uncertainty if using manufacturers data Measure trigger time Notes for delegates attending HAV Management Essentials Programme

http://www.thetooladvisor.com/ Getting Reliable Data Notes for delegates attending HAV Management Essentials Programme

Typical Vibration Values and Trigger Times Tool type Dose Time to 100 Points Time to 400 Points Road breaker – Air – 25kg 3.6 03h 51m 15h 26m Stihl Saw – TS410 3.9 03h 17m 13h 09m Stihl Saw – TS400 6.8 01h 05m 04h 20m Air Orbital Sander – Mirka - New Air Orbital Sander – Mirka – Old 9 00h 37m 02h 28m Battery Orbital Sander - Makita 5.5 01h 39m 06h 37m Makita ½” drive Impact Wrench 16.5 00h 11m 00h 44m Recip Saw – Old Style - Makita 22 00h 06m 00h 25m Multisaw - Fein 11.9 00h 21m 01h 25m values in m/s2 (Metres Per Second Squared) Notes for delegates attending HAV Management Essentials Programme

Exposure Action Value EAV EAV is 2.5m/s2 A(8) or 100 Exposure Points If employees are exposed to vibration above this value then action must be taken to reduce exposure EAV is 2.5m/s2 A(8) or 100 Exposure Points A(8) = average over 8 working hours Actions are based on your Risk Assessment

Exposure Limit Value ELV A(8) = average over 8 working hours Employees must not be exposed to vibration above this value ELV is 5m/s2 A(8) or 400 Exposure Points A(8) = average over 8 working hours Lots of equipment and operations are likely to expose workers to a vibration dose above and beyond the Limit Value

Measuring Trigger Time You could use: A best guess! A stop watch - operated by 2nd person A timer linked to the power source A timer activated by vibration that also monitors points e.g. The HAVi A vibration management system e.g. HAVMETER from Reactec Notes for delegates attending HAV Management Essentials Programme

So how does HAVi work on site? Retrofitted to any tool Vibration magnitude Colour coded Flashing Light HSE points Heavy Duty Operated remotely Trigger time Notes for delegates attending HAV Management Essentials Programme

Personal Protective Equipment Can PPE help? Can Anti Vibration gloves help? 6.3 to 200 Hz Gloves?? Notes for delegates attending HAV Management Essentials Programme

Common Pitfalls Putting it in a box Estimating trigger time Doubling the m/s2 provided by the manufacturer Notes for delegates attending HAV Management Essentials Programme

Manufacturer declared magnitude of 5.4 m/s2 Equation time! Maths Manufacturer declared magnitude of 5.4 m/s2 Equation time! HSE Vibration Points per hour Points = n(1 hour) = 2 x (ahv)2 In other words: (magnitude x magnitude) x 2 k – Uncertainty 2.7 m/s2 Notes for delegates attending HAV Management Essentials Programme

Maths (5.4 x 5.4) x 2 = 58.32 Points per hour K = 2.7 add this to the declared value = (8.1 x 8.1) x 2 = 131.22 points per hour! So adding the K allows for the worst case and still doubles the manufacturers value Notes for delegates attending HAV Management Essentials Programme

Common Pitfalls Putting it in a box Estimating trigger time Doubling the m/s2 provided by the manufacturer Using 5m/s2A(8) / 400 vibration points as a target rather than a limit Poor health surveillance / work history questionnaires Ignoring 10% of women and 5% of men who may have Raynauds Primary! Notes for delegates attending HAV Management Essentials Programme

Health Surveillance Notes for delegates attending HAV Management Essentials Programme

Conclusion Remember HAVS has no cure but its progress can be halted Its now easier to prevent than ever Job risk assessment should aim to keep exposure below 100 points per person Legal limit is 400 points in 1 shift – for emergencies! HAVi is a simple essential piece of PPE HAVi offer consultancy, 1 day IOSH HAV ME and short duration courses for supervisors and operatives Notes for delegates attending HAV Management Essentials Programme

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